A compact neutron spectrometer for characterizing inertial confinement fusion implosions at OMEGA and the NIF

Zylstra, A. B.; Gatu Johnson, M.; Frenje, J. A.; Séguin, F. H.; Rinderknecht, H. G.; Rosenberg, M. J.; Sio, H. W.; Li, C. K.; Petrasso, R. D.; McCluskey, M.; Mastrosimone, D.; Glebov, V. Yu.; Forrest, C.; Stoeckl, C.; Sangster, T. C.

doi:10.1063/1.4880203

Title: A compact neutron spectrometer for characterizing inertial confinement fusion implosions at OMEGA and the NIF

Journal Article · Wed Jun 04 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4880203· OSTI ID:1172498

Zylstra, A. B. ^[1]; Gatu Johnson, M. ^[1]; Frenje, J. A. ^[1]; Séguin, F. H. ^[1]; Rinderknecht, H. G. ^[1]; Rosenberg, M. J. ^[1]; Sio, H. W. ^[1]; Li, C. K. ^[1]; Petrasso, R. D. ^[1]; McCluskey, M. ^[2]; Mastrosimone, D. ^[2]; Glebov, V. Yu. ^[2]; Forrest, C. ^[2]; Stoeckl, C. ^[2]; Sangster, T. C. ^[2]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Univ. of Rochester, Rochester, NY (United States)

A compact spectrometer for measurements of the primary deuterium-tritium neutron spectrum has been designed and implemented on the OMEGA laser facility. This instrument uses the recoil spectrometry technique, where neutrons produced in an implosion elastically scatter protons in a plastic foil, which are subsequently detected by a proton spectrometer. This diagnostic is capable of measuring the yield to ~±10% accuracy, and mean neutron energy to ~±50 keV precision. As these compact spectrometers can be readily placed at several locations around an implosion, effects of residual fuel bulk flows during burn can be measured. Future improvements to reduce the neutron energy uncertainty to ±15-20 keV are discussed, which will enable measurements of fuel velocities to an accuracy of ~±25-40 km/s.

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Research Organization:: Massachusetts Institute of Technology (MIT), Cambridge, MA (United States). High Energy Density Physics Division, Plasma Science and Fusion Center.

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002035; NA0001857

OSTI ID:: 1172498

Journal Information:: Review of Scientific Instruments, Vol. 85, Issue 6; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Calibration of a neutron time-of-flight detector with a rapid instrument response function for measurements of bulk fluid motion on OMEGA Mannion, O. M.; Glebov, V. Yu.; Forrest, C. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5037324	journal	October 2018

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